I am playing as Axis against Soviet normal AI under patch 1.06.06. The current turn is 66, 9/17/1942, when I occupied both soviet permanent supply sources, Baku and Chelyabinsk. I hit End Turn and the AI began running logistics phase, until the 'check unit surrender' segment, the game froze, for already 16 hours. I have every reason to believe that the game program will never see this through.

I experimented with this a little bit and found out that if only Baku was occupied, the program wouldn't freeze. Only when both Baku and Chelyabinsk were occupied would this freeze occur.

This is a bug and I'll add it to the list. If all permanent supply sources are captured, the game should declare an automatic victory rather than crashing. Although it's not explicitly stated, capturing all supply centers shoud isolate all enemy units and you should consider yourself the immediate winner.